Billy Burpelson wrote:


Billy Burpelson wrote:

RHF wrote:

FWIW - Burying the Coax Cable is simply one of the many
Synergistic Elements that goes into making a Low Noise
Shortwave Radio Listening (SWL) Antenna -a-la- John Doty

Three Rec.Radio.Shortwave Messages to Read -by- John Doty
http://groups.google.com/group/rec.r...bc6a2bf8acc12d
Well, "John Doty" in the reference above says:

Any *unshielded* [my emphasis added] conductor in your antenna/ground system is capable
of picking up noise: the antenna, the "lead-in" wire...
First of all, isn't the "lead-in wire" (coaxial cable in this
discussion) -shielded- ? So according to his -own- statement, coax
shouldn't have to be buried, at least from a noise mitigation viewpoint.

Doty continues:

You can keep noise currents away from the antenna by giving them
a path to ground near the house, giving antenna currents a path to
ground away from the house, and burying the the coaxial cable from
the house to the antenna.

In the 1930s, Bell Laboratories, while investigating power line
influence on telephone cables, proved that burial had NO effect on noise
being induced into the telephone cables; i.e., 20 feet of aerial
separation, from a noise standpoint, was exactly the same as 18 feet of
aerial separation plus being buried 2 feet deep.

Hmmm...should I believe "John Doty" or Bell Labs? You're a smart guy --
I'll let you figure that one out for yourself. :-)

dxAce wrote:

Or, you might believe the 1990's rather than the 1930's :-)

Well, I don't know about the "1990's" (isn't this the 2000s?), but it
became a big issue in the 30s due to the rapidly expanding
electrification of America.

In any event, I'm sure that even the most superficial research on your
part will show that the applicable Laws of Physics have not changed
since then.

But the ability to diagnose the debutantes, the malcontents and the faux's of SWBC certainly
have!